876 ALASKAN GLACIER STUDIES jacent ice tongues, was much more extensive and retained essentially the same position between 1787 and 1898, and that it retreated a long distance between 1898 and 1908. In the latter year the glacier was studied and mapped by Grant and Higgins,1 when they spent one day in Icy Bay, mairing the map reproduced as Fig. 56, taking photographs and discovering the retreat of two to three miles. They quote a native tradition that this glacier extended to the mouth of Icy Bay about a century before and interpret this as meaning the mouth of Nassau Fiord because of the relationships of forest and barren zones. In 1909 the G.W. Perkins party visited Icy Bay and proposed that this ice tongue be called Princeton Glacier; but, since Grant had previously called it Chenega, the name Princeton is applied by Grant to the glacier east of it. Perkins also named the Tiger's Tail Glacier, the Tiger Glacier, and Nassau Fiord; and one of the officers of his ship determined the height of the ice cliff of Chenega Glacier. The National Geographic Society's 1910 party spent portions of two days at Chenega Glacier, and found the ice front in about the same position as in 1908. A comparison of photographs, taken from one of the Grant and Higgins' photographic _________________ _______ stations (c, Fig. 56), showed FIG. fi6. THE, GLOBES or Icr BAT m 1794, 1898, AND 1908. m the two f^™ no 9i^^~ Barren zone shown by dashed line and letter b. Souudings in feet. c™t <&*&%*> although con-(After Vancouver, Glenn, and Grant and Higgins.) ditions along the eastern edge, and an especially marked increase in the height of the terminal cliff, suggested the possibility of a slight advance being then in progress (PL CXLV, A). Princeton Glacier. Princeton Glacier, of about the same size as Chenega Glacier and fed from adjoining snowfields, is no longer tidal. The terminus of the eastern margin is so encumbered with ablation moraine, that this side of the glacier appears dirty. About a half mile back from the water's edge, there is a medial moraine near the eastern margin which, however, extends diagonally across the glacier, so that at the terminus, it is close to the western margin. The lower end of the Princeton Glacier slopes gradually, in contrast with the frontal precipice and steep slope of Chenega Glacier, and the surface is very little crevassed. i Bull. Amer. Geog. Soc, Vol. XTJTT, 1911, pp. 410, 414-116.